There are some promises in the Bible which I have never yet used; but I am well assured that there will come times of trial and trouble when I shall find that poor despised promise, which I thought was never meant for me, will be the only one on which I can float. I know that the time is coming when every believer shall know the worth of every promise in the covenant.

Sermons of the Rev. C.H. Spurgeon: Second series (ed. 1857)